What is the function of the atrium in the heart?
The atrium is the upper chamber of the heart that receives blood from the veins. It is responsible for the filling of the ventricles with blood before ejection into the systemic circulation. The atrium provides a pathway for blood to enter the ventricles, which then contract and pump the blood out The atrium also serves as the primary chamber for filling the ventricles with blood before ejection into the systemic circulation.